Shen Zhiwei, a modern female forensic doctor, traveled through time and became the eldest daughter of a declining herbal medicine merchant in Shanghai. In order to find out the truth about her family's annihilation, she signed a contract marriage with the cold-blooded warlord Xiao Jin (whose identity is Jiangbei Marshal, but is actually the person in charge of the "Fire" operation of the underground party of the Chinese Communist Party). The two were involved in a series of espionage and murder cases while testing each other. From exploitation to fall, they protected each other and their faith in the ashes of troubled times.
